We're using in-cursor storage for our search keys, return a reference
to that instead of re-retrieving the key from the page and copying it
into the application's cursor.
Rename "retb" to be "keyb", it always holds a key.
whitespace
fix a comment
Merge pull request #987 from wiredtiger/fast-row-store-return

Row-store return.
Stop running checkpoint tests after a failure.
Simplify test/checkpoint: use integer keys in row stores to avoid different code paths for ROW vs COL.  Ensure all tables are updated to the same value.
If there is a value mismatch in a checkpoint, do lookups in the original tree to see whether it is okay there.
Merge pull request #990 from wiredtiger/test-checkpoint-mjc

Simplify test/checkpoint
Only use the search key if we have an exact match.

refs #987